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| Titel |
Measurement of strain rate components in a glacier with embedded inclinometers |
| VerfasserIn |
A. Keller, M. Funk |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250067699
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| Zusammenfassung |
| We present measurements with inclinometer-magnetometer probes
inserted in glacier ice and discuss the underlying mathematical theory
to extract velocity gradient components from this data. Assumptions on
the ice flow field must be made to reduce the number of unknowns and
to close the system of equation obtained from the theory. With the
incompressibility assumption and the first order
plane strain approximation, the evolution equation for the tilt of the main
sensor axis can be solved exactly and the obtained function can be fit
to measured data to obtain optimal shear and normal strain components.
Daily variations superposed on the tilt evolution reflect variations in
sliding and perhaps partial elastic recovery of deformations. |
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